Improvement in belt-shifting apparatus



UNITED STATES PATENT OFFICE.

OLIVER H. WADE, OF EAST BRIDGEWATER, MASSACHUSETTS.

IMPROVEMENT IN BELT-SHIFTING APPARATUS.

Speciiication forming part of Letters Patent No. 143,736, dated October 14, ,1873; application filed Aprile, 1873.

To all whom t may concern: ward motion of the arm F being equal to the Be it known that I, OLIVER H. WADE, of downward motion of the rod E, as the two are East Bridgewater, in the county of Plymouth connected by the string I. To the end of the and State of Massachusetts, have invented a arm F I attach the belt-guard KI This guard certain new and Auseful Belt-Shifting Appa- K is free to swing upon the arm F, and thus ratus, of which the following is a specification: adapt itself to the natural twist of the belt, as

The nature of my invention consists in arshown in Figs. 3 and 4.

ranging a device for shifting belts from one To use my belt-shifter I proceed as follows:

size pulley to another, or, as they are com- Vhen I wish to change from the larger pulley monly designated, cone-pulleys. This I effect to a smaller one overhead, I have simply to by the use of an adjustable belt-guard, in comturn the shifter so that the guard K will push bination 'with a sliding rod that has a motion against the belt, as indicated in Figs. 3 and 4, on its axis so that the guard may be brought and force it from the larger toward the smaller as near to the pulley as desired in all direcpulley. This action, combined with the runtions, and, it beingadjustable, will force the ning of the belt, will soon throw itA onto the belt in the desired direction, and at the saine smaller pulley, and leave the end of the belt time allow the belt to twist into position to loose, so that the operator can easily guide it readily go onto the neXt pulley. The object `with his hands onto the corresponding lower of this invention is to facilitate the operation of pulley. changing the belt when one of the cones is out To change the belt from a smaller pulley to of the immediate reach of the operator. a larger. one overhead, the operator throws the Figure l is a plan, showing my invention. belt off from the lower pulley, then -turns the Fig. 2 is an elevation of the same. Fig. 3 is a shifter so that the guard K will force the belt side elevation lof a part of the same. Fig. 4. toward the larger pulley overhead, and thus shows a part of the shifter in plan. cause it to run onto it.

Let A and B represent two cone-pulleys, The object of causing the arm F to project such as they use for a lathe, for instance, more or less at different times is so that it may the cone A being hung to the ceiling or at a accommodate itself to the diiferent-size pulconsiderable elevation. L represents the belt leys on the upper cone. Thus, in shifting the which communicates power from one to the belt from one of the smaller to the neXt larger .other. C is a bracket, to which I attach my it is better that the arm F should be extended belt-shifter. D is a hollow rod, suspended in so that the guard Kmay be near to the pulley; such a manner' as to be free to turnon its axis. but in case we go from the largest to the next Upon this rod I attach an arm, I), extending smaller the arm F wants to be withdrawn, as laterally from the rod D,as shown. Within shown in Fig.4. this arma sliding arm, F51 is placed, and so ar- I claim as my inventionranged that it may be drawn out by the cord l. The turning-rod D, in combination with I, one end of which is attached to the inner the arm P and belt-guard K, operating subend of F, and the other end to the sliding rod stantially as described, and for the purpose E, so that if E is drawn downF will be thrown set forth. out. II is a spring, which serves to draw F 2. The combination of the rod D, the sliding back into place. The rod E above referred to rod E, arm F, and the guard K, operating subslides up and down in the rod D, as shown in stantially as described, and forthe purpose set Fig. 3, and also serves as a handle to turn the fort-h. rod D and the arm P F. M is apawl, attached OLIVER H. WADE. to the rod E, and contacts with notchesin the rod D so as to hold the rod E in any desired Witnesses: position. By drawing down the rod E the arm FRANK G. PARKER, F is thrown out, as above referred to, the out- A ETILLIAM EDsoN. 

